This degree days reference table shows the heating degree days for a range of base temperature values, assuming an average daily temperature of 10 °C. Every figure is computed with the same engine that powers our Degree Days Calculator, so the numbers are exact.
| Base temperature | Heating degree days | Cooling degree days |
|---|---|---|
| 4.5 °C | 0.0 | 5.5 |
| 9 °C | 0.0 | 1.0 |
| 14 °C | 4.0 | 0.0 |
| 18 °C | 8.0 | 0.0 |
| 27 °C | 17.0 | 0.0 |
| 36 °C | 26.0 | 0.0 |
| 54 °C | 44.0 | 0.0 |
| 90 °C | 80.0 | 0.0 |
| 130 °C | 120.0 | 0.0 |
| 180 °C | 170.0 | 0.0 |
How to use this table
Find the row closest to your base temperature and read across to the heating degree days. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Degree Days Calculator for a precise answer.
Need a value that is not in the table? — the Degree Days Calculator does it instantly, for free, with the formula and a worked example built in.
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